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Difficulty: HardHydroplaning and Wet Road Traction Loss

A motorist traveling at 55 mph on a highway enters a sudden heavy downpour. The vehicle's steering wheel abruptly feels unnaturally light and unresponsive, while the engine RPM momentarily surges without any corresponding vehicle acceleration. The cruise control system is currently active. Which of the following describes the most appropriate immediate action for the driver to take?

  1. Disengage cruise control without braking, gradually ease off the accelerator, and steer straight until the tires regain road contact.Answer
  2. B
    Apply firm, continuous pressure to the brake pedal to activate the anti-lock braking system (ABS) while steering toward the right shoulder.
  3. C
    Maintain active cruise control to stabilize vehicle speed while pumping the brakes repeatedly to clear standing water from the tire treads.
  4. D
    Press the accelerator pedal lightly to increase forward momentum and cut through the water layer while executing quick steering adjustments.

Answer

Disengage cruise control without braking, gradually ease off the accelerator, and steer straight until the tires regain road contact.
Deactivating cruise control eliminates dangerous automatic throttle feedback during wheel spin. Releasing the accelerator allows the vehicle to decelerate naturally below the critical hydroplaning speed, permitting the tread to channel water away and re-establish tire contact with the road while maintaining a straight steering path prevents skidding.

Step-by-Step Solution

1
Recognize hydroplaning indicators and active risk factors
Identify that loose steering and rising engine RPM indicate loss of tire-to-road contact due to a layer of standing water, complicated by an active cruise control system.
Hydroplaning occurs when water accumulation exceeds the water displacement capacity of the tire tread.
2
Deactivate automated speed systems immediately
Disengage cruise control using the steering wheel switch or stalk without pressing the brake pedal abruptly.
Cruise control will attempt to maintain target speed by opening the throttle if it detects drive wheel spin, escalating traction loss.
3
Reduce vehicle speed naturally and maintain directional stability
Smoothly release pressure on the accelerator pedal while keeping the steering wheel pointed straight ahead.
Decelerating smoothly allows aerodynamic drag and rolling resistance to drop vehicle speed below the hydroplaning threshold, enabling tire tread channels to evacuate water and restore traction without triggering a skid.

Key Concept

Hydroplaning Recognition, Cruise Control Risk, and Vehicle Recovery Mechanics
Estimated Time:1m 30s
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Topics

Hydroplaning and Wet Road Traction Loss

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